KR20060083946A - Lock system of window for cabin - Google Patents

Abstract

The locking device is formed of a combination structure of a rotary latch and a release lever that regulates rotational movement in the release direction of the latch, and the release lever release holding mechanism that engages with the release lever at the release position of the latch by the release lever. This release lever release holding mechanism is configured to release the release lever when the latch rotates at the required rotation angle. Moreover, in the impression opening type window which is guided by a pair of left and right guide rails and is moved upward from a standing closed window position and is stored, it is notched at the upper and lower ends of a window frame in the lower and lower position than a guide rail at both ends of a window frame. And a locking mechanism having a latch capable of rotating movement at a position displaced by the required rotation angle in two directions and a release lever for regulating and releasing the rotation movement of the latch. A striker for holding the window frame in engagement with the latch notch of the latch at the end portion is arranged so as to be arranged on the support structure in parallel with the rotation axis of the latch.

lock

Description

Cab Window Lock {LOCK SYSTEM OF WINDOW FOR CABIN}

1 is an overall perspective view of a cab for a construction machine in which a locking device according to a first embodiment of the present invention is installed;

2 is a longitudinal sectional view of a cab for a construction machine;

3 is a front view showing the main portion of the locking device of the first embodiment by cutting away;

4 is an exploded perspective view of the locking device shown in FIG. 3;

5 (a) (b) (c) are explanatory diagrams (1) of operation of the locking device according to the first embodiment;

6 (a) (b) (c) (d) are explanatory diagrams (2) of operation of the locking device according to the first embodiment;

7 is a partially cutaway front view of the locking device according to a second embodiment of the present invention;

8 is a partially cutaway view of a locking device according to a third embodiment of the present invention;

9 is a sectional view seen from A-A of FIG. 8,

10 is an explanatory diagram of a locking device according to a third embodiment;

11 (a) (b) (c) are explanatory diagrams (1) of operation of the locking device according to the third embodiment;

12 (a) (b) (c) are explanatory diagrams (2) of operation of the locking device according to the third embodiment;

13 is a partially cutaway side cross-sectional view of a locking device according to a fourth embodiment of the present invention;

14 is a view showing the main parts of the locking device of the fourth embodiment;

FIG. 15 is a view seen from B-B of FIG. 13;

FIG. 16 is an enlarged sectional view seen from C-C of FIG. 2;

17 (a) and (b) are diagrams illustrating the operation of the locking device according to the fourth embodiment (1),

18 (a) and (b) are explanatory diagrams (2) of operation of the locking device according to the fourth embodiment;

19 (a) (b) (c) are explanatory diagrams (3) of operation of the locking device according to the fourth embodiment.

Explanation of symbols on the main parts of the drawings

1: Cab body 2: Front pillar

3: ceiling side part 4: guide rail

5: front window 6: window frame

7: guide roller 8,8 ': handle for window opening and closing

10: locking mechanism 11: bracket

13: latch 15: release lever

The present invention relates mainly to a cab window lock device installed in a cab of a construction machine, and more particularly, to a cab window lock device to lock a cab window such as a front window that can be opened by a lifting operation in a required position. It is about.

Background Art Conventionally, for example, in a cab for a construction machine, an openable front window is provided on its front face to confirm a work situation when performing a front work. The front window is normally pulled forward from the inside of the cab, lifted upward, and moved to the ceiling side in the cab for storage.

Such a windshield is normally fixed on the front side of the cab so that rainwater and dust from the outside do not penetrate into the room, and at the time of opening, it is required to be kept in a stable state at the storage position. Therefore, in this type of front windshield, as described, for example, in Japanese Unexamined Patent Application Publication No. Hei 10-311061, a cladding type that engages with a locking hole provided in the front pillar of the cab or the like on the upper both ends of the window frame. A locking mechanism is provided, and when the window is opened or closed, the latch (locking pin) of the locking mechanism is pulled out to unlock or lock the window. Moreover, in this prior art, when the window frame is moved to the storage position, the holding lever is automatically engaged with the roller shaft at the end thereof, so that the holding mechanism is provided to hold the window frame so that the window frame does not return from the storage position. .

On the other hand, in place of the above-described locking device of the latch type, it is known to employ a locking mechanism of a type engaged with a striker fixed to the structure (cab body) side by rotating the latch. Proposed by. In this locking mechanism, the striker fixed to the cab body on the cab body side is mounted in the up and down position so as to move the plate member with two engaging grooves together through the bracket on the frame side of the window to be moved. When the plate members are released by one release lever, the engaging grooves in both plate members provided to face each other with the force of the torsional springs that are provided together open toward the striker, and they engage as if swallowing the striker. When accommodated in the groove, the engaging groove and the striker are locked in the engaged state, and in order to release the lock, the release lever is rotated as opposed to the engaging state by the release lever to release the locking (lock). It is.

Moreover, in JP-A-8-312220, the locking mechanism which hangs each movable body in the fixed position and the position moved with one latch is disclosed. In this publication, a locking groove (notch) is provided in two different directions in a locking plate that enables rotational movement, and a lock release lever for regulating the rotational movement of the locking plate is used in combination. Operating the handle when opening and closing the slide door releases the restriction of the lock plate by the lock release lever, and moves the door away from the lock groove of the lock plate engaged with the lock piece, and then moves to the slide end position of the door. When it reaches this time, the locking groove is engaged with the locking piece at the corresponding position and locked.

However, in the locking device of the latch type described in Japanese Unexamined Patent Publication No. Hei 10-311061, the locking pin must be inserted into the locking hole to be inserted, and the operation of stopping the locking pin by rotating the locking pin is necessary to stop the latch. Therefore, there exists a problem that operability is bad. In addition, the alignment of the locking pin and the pin hole (lock hole) requires a gap between the diameter of the pin hole and the diameter of the pin to facilitate insertion, which causes the front frame to vibrate and cause noise. There is a problem that occurs, or the pin hole is worn and the vibration is greater.

In this publication, it is necessary to install the locking mechanism at the fixed position of the front window and the retaining mechanism at the storing position in a different structure. The reason for this is that the directions for locking or holding position are completely different. For this reason, the operation in locking or unlocking is also a separate operation, which also has difficulty in operability.

In the latch structure locking mechanism described in Japanese Patent Application Laid-open No. Hei 10-311062, since the two plate members having the engaging grooves are installed facing each other up and down, they are moved together to open and close the engaging grooves. However, there is a problem that it becomes inevitable that the mechanism becomes complicated. In addition, this locking mechanism is effective only for locking in a posture in which the window stands, and there is a problem in that stability is insufficient when the posture is changed.

In addition, the locking mechanism described in Japanese Patent Application Laid-open No. Hei 8-312220 is effective in that it can act in two directions, but by using such a latch (locking plate), the posture is changed from the vertical direction to the horizontal direction. There is a problem with the configuration described in this publication for locking or holding the moving window frames at the end of the movement respectively. In other words, when changing the posture of the target window frame from the standing state to the upward direction, the window frame needs to be locked by pressing the support frame at the edge of the window against the support structure at the standing position, and lowered to gravity at the position stored above. While other functions are required such as to keep going and to keep from going back, it is difficult to use the latch mechanism described in the above publication as it is for a cab window that needs to satisfy such a function.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. Firstly, an object of the present invention is to provide a cab window locking device that can realize a stable locking operation as well as an easy unlocking operation.

In addition, the present invention provides a cab window locking device that can reliably close or hold a closed window at either the closed window position or the upper storage position in a pull-open window. It aims to do it.

In order to achieve the first object described above, the cab window locking device according to the first invention,

A cab window locking device comprising a latch of a rotary motion type and a release lever for regulating a rotary motion in a release direction of the latch,

And a release lever releasing holding mechanism that engages with the releasing lever at the unlocking position of the latch by the releasing lever and maintains the releasing state of the releasing lever. The releasing lever releasing holding mechanism has the latch at a required rotational angle. The rotational movement is characterized in that it is configured to release the release lever.

According to the present invention configured as described above, when releasing the engagement between the latch and the release lever by operating the release lever to release the latch, the release lever releasing holding mechanism coupled with the release of the latch by the release lever is provided. The release lever is restrained and temporarily held. Therefore, since the latch is freed, the lock can be released by rotating with the rotational movement force. As the latching position of the latch and the release lever is displaced by the rotation of the latch in the release direction, the release lever release holding mechanism is also operated by the latch to release the release lever and release the striker (close bolt). ) And the release lever can be returned to the position where the release lever can be engaged with the latching position of the latch.

The locking device of the present invention is configured as described above. In releasing the lock operation to release the lock, the latch is automatically released when the latch is unlocked by operating the release lever of the latch. It is possible to release without adding a process such as, there is an effect that can improve the workability in the case where it is necessary to release a plurality of locking devices.

In the present invention, the release lever release holding mechanism is a latch for the release lever that is supported on the support shaft of the latch and to rotate together only during the rotational movement in the release direction of the latch, and the latching end of the release lever. The striker for holding the release lever installed adjacent to the release lever and a spring for elastically supporting the release lever latch in a return direction may be provided. In this way, the mechanism for holding and releasing the release lever can be arranged on the same axis as the latch, so that the whole can be compactly arranged and the number of parts can be reduced, thereby reducing the cost.

In this case, the latch for the release lever is provided with a locking recess for engaging with the striker and engaging the release lever and a protrusion formed in contact with the locking recess, and the tip of the protrusion is latched by the release lever. When the striker is located within the radius of rotation of the tip of the protrusion and is displaced to a position where the latch latched state by the release lever is released, the striker preferably reaches a position exceeding the radius of rotation of the tip of the protrusion. In this way, the striker attached to the distal end of the release lever is prevented from returning the release lever at the moment when the latch release operation by the release lever is performed by the protrusion end formed on the latch for the release lever. The release lever can be reliably released. In addition, the striker of the release lever can be restored by the rotational motion after the latch is unlocked, and during the next locking operation, the striker is restrained within the rotation radius of the tip of the protrusion and the release lever is locked in the locked state. It can be kept stable.

In addition, the release lever release holding mechanism is a locking claw piece which is installed so that the leading end portion of the release lever toward the leading end of the release lever by pivoting the base in the vicinity of the engaging end of the release lever; An operation pin for operating the locking claw piece by a rotational motion, and a spring for elastically supporting the locking claw piece at all times in the direction of the rotational axis of the latch, and the striker being operated by the locking claw piece. It may be done. The striker is located within the rotational radius of the front end of the locking claw piece in the latched state, and when the striker is displaced to a position where the latched state is released, the striker reaches a position exceeding the rotational radius of the front end of the locking claw piece. good.

In this way, by releasing the engagement with the latching portion of the latch by releasing the lock by releasing the lock, the protrusion protruding from the outer surface portion of the latching latching end of the release lever is pushed outwardly in contact with the distal end of the locking claw piece. do. Then, the locking claw piece is rotated on the basis of the pivot support point of the base, and the contact with the projection on the side of the latching end of the release lever is broken, so that the projection shifts outward from the tip of the locking claw piece and is fixed. As a result, the latch can be freely rotated in the unlocking direction by the rotational force of the torsion spring or the like, which is elastically supported, thereby releasing the engagement with the striker to release the structure (door or window, etc.) of the locking device. Further, by the rotational movement of the latch, the operation part piece is pushed outward by the circumferential surface thereof, and the locking claw piece is moved outward to free the release lever, whereby the release lever returns to the latch side, and then the latch engages with the striker. In this state, the locking end can be locked by engaging the end of the latch. In this way, in conjunction with the release operation of the latch, the release lever release holding mechanism can release the release lever without undue force, and thereafter, the release lever can be interlocked with the release of the latch to immediately respond to the next locking operation. Can be returned automatically.

Next, in order to achieve the above-described second object, the cab window locking device according to the second invention,

A cab window locking device, which is guided by a pair of left and right guide rails attached to a support structure, is moved to a storage position changed from a standing position to an upward position by moving a movable window frame from an upright position.

At both ends of the upper side of the window frame, a latch capable of rotating and having a position in which the two locking notches are displaced at a necessary angle in a position outside the window frame in the width direction and inward of the guide rail is regulated. A locking mechanism having a release lever for releasing and releasing is provided, and a striker for engaging the latch notch of the latch and holding the window frame at the upper end of the window frame and the end of the storing position is provided with a rotation axis of the latch. It is characterized in that arranged in the support structure in parallel to each other.

In the present invention constituted as described above, the latch notch is provided in two directions so that the locking direction is different from the latch capable of rotational movement of the locking mechanism provided at the upper both ends of the window frame, and the locking position or the opening in the closed window state. Since the window frame can be fixed at each position by changing the engagement direction between the striker provided on the support structure and the latching notch of the latch as it is in accordance with the change in the attitude of the window frame, in the storing position after moving upward. Even though the window frame holding state is different with one latch, the effect can be securely and reliably maintained. In addition, since the locking mechanism can have a simple structure by a latch capable of one rotational movement and a release lever for regulating (locking) and releasing the rotational movement of the latch, the locking mechanism can be made smaller in the upright position from the upright position. There is an advantage in that it does not cause any trouble in lifting and storing.

In the present invention, the latch is fixedly supported by the support structure at the time of closing the locking notch that can lock the first striker protruding from the upper side than the rotational support shaft, and fixed support to the support structure at the corresponding position at the time of opening. It is preferable to have a latching notch which can engage and hold the protruding second striker from the lower side than the rotation support shaft.

In this configuration, in the closed window position, the window frame is moved forward for closing the window, and then the latch and release lever, etc. are brought close to the window frame by engaging the latch notch on the first striker at the corresponding position. It can be made to adhere | attach and can form small volume structurally. In addition, the latching notches of the latch are provided so as to open radially at two positions, and at the closed window position, the position of the first striker is positioned above the rotational support shaft of the latch, and the position of the second striker at the storing position. By lowering the window frame to the storage position after opening, the latch notch on the other side of the latch engages and locks with the second striker in the storage position without requiring any manipulation. Will be. Therefore, when the window frame is lifted up and moved to the storage position as it is, it is automatically locked, thereby improving workability.

Further, it is preferable that the striker confinement side end of the opening in the latch notch of the latch is formed longer than the striker holding side end. This makes it possible to stably maintain the holding of the striker in the locked state.

Best Mode for Carrying Out the Invention

Next, a specific embodiment of a cab window locking device according to the present invention will be described with reference to the drawings.

(First embodiment)

1 shows an overall perspective view of a cab for a construction machine equipped with a locking device according to a first embodiment of the present invention, and FIG. 2 shows a longitudinal sectional view of the cab. 3 is an exploded perspective view showing the main portion of the locking device of the present embodiment, and FIG. 4 is an exploded perspective view of the locking device shown in FIG.

This embodiment is applied to the locking device of the impression-opening front windshield installed in the front of a cab in construction machines, such as a hydraulic excavator. The cab main body 1 is provided with a pair of left and right guide rails 4 and 4 on the interior side of the front pillars 2 and 2 located in front of the cab body 3 and 3, and the guide rails 4, 4) Along the front window is freely installed. On both sides of the window frame 6 of the front window 5, guide rollers 7 are respectively attached to the upper and lower parts by rotation of the support shaft protruding from the side of the window frame 6, and these guide rollers 7 By moving along the guide rail 4, the front window 5 can be moved to the lower surface 3 position from the front surface of the cab main body 1. Moreover, in order to move this front window 5 up and down, the window opening and closing handles 8 and 8 are provided in the upper part and the lower part of the window frame 6, respectively.

The guide rails 4 and 4 provided on the cab main body 1 are bent and projected forward than the portion where the lower end portion 4a is installed along the front pillar 2, and the cab main body 1 at the front upper position. Has a branching part 4b which protrudes forward from the curved part 4c which curves by the ceiling part 3).

The glass 6a is fixed to the front window 5 by mounting members (not shown) which are provided in plural intervals at the front side of the window frame 6 of the main structure. In the front window 5, the lower guide roller 7 is received by the lower end 4a of the guide rail 4 at the closed window position, and the upper guide roller 7 is the branched portion 4b of the guide rail 4. When the front windshield 5 is pushed toward the front pillars 2, 2, the front edge of the glass 6a abuts against the seal member provided on the cab body 1 side, and water leaks. It is supposed to stay intact.

In the upper part of the interior side of the front windshield 5 formed in this way, the locking devices 10 and 10 are supported by the window frame 6 on both left and right sides, respectively, and are installed symmetrically. In each of these locking devices 10, 10, a latch 14 rotatably provided is disposed outside the window frame 6, and on the cab body 1 side in the position where the front window 5 is closed. The striker 30 protrudes in parallel with the support shaft 13 of the latch 14 via the mounting bracket 31.

Since the locking device 10 is provided symmetrically, only one side thereof (specifically, on the left side from the driver's seat side) will be described.

The locking device 10 includes a bracket 11 protruding from an upper portion of the window frame 6 inward in a direction orthogonal to the window glass 6a, and a bolt 33 that bases the bracket 11. It is possible to freely rotate around the frame 12 formed by combining two pieces to be attached, and a support shaft 13 supported at both ends of the frame 12 and arranged in parallel with the window glass 6a. A latch 14, a striker 30 protruding in parallel with the support shaft 13 on the cab body 1 side, and a release for disengaging the latch 14 and the striker 30 from engagement. A combination of the lever 15 and the release lever release holding mechanism 20 that releases and releases the release lever 15 after the latch 14 is unlocked.

A latch notch 14a is formed in the latch 14 from the rotation center to the radially outer side. The latch recess 14 is formed between the formation position of the latch notch 14a and the support shaft 13 between the latches 14 on the opposite side. 14b) is installed. A torsion spring 17 is fitted to the support shaft 13 of the latch 14, one end of which is locked to the frame 12 side, and the other end of which is held in place of the latch 14, thereby causing a latch ( 14), the rotational force in the clockwise direction on the drawing is always elastically supported.

With respect to such a latch 14, the release lever is positioned so that the axis of the pivot support shaft pin 16 is located on an upright surface (a plane parallel to the window frame 6 in the drawing) passing through the axis of the support shaft 13. 15) is installed. This release lever 15 becomes a locking end portion 15a at the leading end side of the pivot support shaft pin 16. When the locking end portion 15a is engaged with the locking recess 14b formed in the latch 14, The latch 14 is locked. In addition, the torsion spring 17 'for return is fixed to the frame 12 by the release lever 15 so as to be able to automatically return after the latch is released.

Moreover, the striker 18 protrudes in parallel with the pivot support shaft pin 16 at the side close to the engaging end 15a of the release lever 15, so as to be related to the release lever release holding mechanism 20 described later. It is.

The release lever release holding mechanism 20 mainly has a release lever latch 21 whose rotational movement is freely installed in parallel with the latch 14 on the support shaft 13 of the latch 14. A torsion spring 24 which elastically supports the rotational movement force in the direction of always closing the latch 21 (always counterclockwise in the drawing), and the locking recess 21a of the release lever latch 21 is released. The latch 14 is kept locked in engagement with the striker 18 provided on the lever 15. When the latch 14 is released, the striker 18 of the release lever 15 is removed from the latch 14. At a distance, the latch 14 is free.

The release lever latch 21 engages the release lever 15 by engaging a striker 18 which is rotatably supported on the support shaft 13 and installed on the engaging end 15a of the release lever 15. The hook recess 21a, the hook 22 projecting in the circumferential direction in contact with the hook recess 21a, and parallel to the support axis at a position away from the projected angle 22 by the required rotation angle. And the catching piece 23 bent toward the circumferential surface side of the latch 14 so as to be made, and as described above (shown in FIG. 3), the striker 18 of the release lever 15 catches the catching portion 21a. ) Is held by the accumulation force of the torsion spring 24 in engagement with

In the latch 21 for the release lever, the projecting portion 22 sharpens the tip end 22a, and the rotation radius at which the striker 18 attached to the release lever 15 rotates by the release operation ( r) When the release lever 15 is rotated to the position of the stopper 19 provided in the frame 12, the rotational movement range of the tip 22a of the protrusion 22 in the latch 21 for the release lever is rotated. The striker 18 is out from the rotation radius R, and the return is prevented by the tip 22a of the protruding portion 22.

In addition, the locking piece 23 in the release lever latch 21 is operated to release the latch 14 by the release lever 15, so that the striker 18 contacts the locking recess 21a. Since the latch 21 for the release lever plays a role of suppressing the rotational movement by the accumulation force of the torsion spring 24 at a point away from the engagement with the projecting portion 22 to be joined, the locking piece 23 The latch 14 is in contact with the locking portion 14c formed on the circumferential surface between the locking recess 14b and the locking notch 14a to stop further rotation.

The frame 12 supporting the latch 14 and the release lever 15 and the release lever release holding mechanism 20 thus formed is composed of a combination of two frame portion pieces 12a and 12b as described above. The latch 14, the release lever 15, and the release lever release holding mechanism 20 are accommodated in the space portion formed by combining these frame portion pieces 12a, 12b. The upper side is released from the space portion formed by the frame 12 so that the latch 14 and the striker 30 on the spherical side are engaged and disengaged. Moreover, the handle 15b which operates the release lever 15 protrudes outward from the opening 12d cut | disconnected in the lower part of the frame 12, and is operable. In the figure, reference numerals 12e and 12e 'denote mounting holes of the support shaft 13 of the latch 14, 12f denotes support holes of the pivot support shaft pin 16 of the release lever 15, and 12g denotes the bracket 11; Mounting bolt hole.

Next, the operation of the locking device of the first embodiment will be described with reference to FIGS. 5 and 6.

First, in lifting and opening the front window 5, in order to release the locking device 10, the handle 15b of the release lever 15 is pulled in the direction of the arrow (a) in FIG. 5 (a). , The release lever 15 is rotated with the pivot support shaft pin 16 as the point so that the locking end 15a is separated from the locking recess 14b of the latch 14 as shown in FIG. .

By further operating the release lever 15 in a rotational motion, the striker 18 provided on the tip end side thereof is detached from the locking recess 21a of the latch 21 for the release lever. When the release lever 15 contacts the stopper 19 and moves until the rotational movement is regulated, as shown in Fig. 5C, the striker 18 protrudes 22 of the latch 21 for the release lever. It will be in the state exceeding the rotation radius R of the front-end | tip 22a.

Since the latch 14 is completely free with respect to the release lever 15 when it becomes the state shown in FIG. 5 (c), the latch 14 is shown by FIG. 6 by the return force of the accompanying torsion spring 17 (refer FIG. 4). As shown in (a), it rotates clockwise (direction of arrow b) on a drawing. At the same time, the locking end 15a of the release lever 15 is in contact with the circumferential surface between the locking recess 14b of the latch 14 and the locking portion 14c so as not to lock the latch 14 again.

Then, since the latch 14 rotates in the direction of the arrow b, the latch 14 moves in the opposite direction to the latch 14 due to the restoring force of the torsion spring 24 to the latching portion 14c of the outer circumference of the latch 14. The latching piece 23 at the end of the release lever latch 21 that rotates is engaged with each other, and the release lever latch 21 rotates back together with the latch 14 (Fig. 6 (b)). Reference).

In this way, when the latch 14 rotates, the striker 30 engaged with the locking notch 14a is brought into the starting disengagement state from the locking notch 14a. Therefore, with the window opening and closing handles 8 and 8 'for opening the front window 5, an operation of lifting the window frame 6 is added, and the latch 14 as shown in FIG. Reaction force is applied to the striker 30 engaged with the locking notch 14a of the latch 14, and the latch 14 is actively rotated, and then the window frame 6 is moved away from the striker 30 (see FIG. 6 (d)). The guide rails 4 can be lifted (pushed) under the ceiling to be stored.

In the state where the locking device 10 is unlocked as described above, as shown in Fig. 6 (d), the locking end portion 15a of the release lever 15 abuts against the circumferential surface of the latch 14 thereof. The latch 14 and the latch 21 for the release lever are held at a position away from the recess 14a, and the latch 14 is held in an equilibrium in a state where the locking piece 23 is engaged with the locking portion 14c. (5) Hold this position until you close it.

In order to close and lock the front window 5, the window frame 6 is fully pushed to the locked position with respect to the latch 14 of the locking device 10 held in the unlocked state as described above (shown in FIG. 6 (d)). In this case, the inner edge 14a 'of the opening 14 of the latch notch 14a of the latch 14 contacts the striker 30 in the correct position and is pressed and returned by the striker 30 (see Fig. 6 (c)). In response, the latch 14 rotates in the opposite direction to the one described above to receive the striker 30 into the locking notch 14a.

In this case, the locking end part 15a of the release lever 15 which was in contact with the circumferential surface by the reversal of the latch 14 displaces to the position where the circumferential surface of the latch 14 is broken in the middle, and this release lever It is returned by the accumulating force of the torsion spring 17 'which is fitted to the pivot support shaft pin 16 of 15, and is engaged with the locking recess 14b of the latch 14. As a result, the latch 14 ) Is locked by the release lever 15.

(Second embodiment)

7 shows a partial cutaway view of the locking device according to the second embodiment of the present invention. The locking device 10A of this second embodiment has the same basic configuration as that of the first embodiment, but the shape and release lever 15 of the release lever latch 21A in the release lever release holding mechanism 20A. ), The shape of the striker 18A attached to the one is different. Therefore, the same reference numerals are given to parts corresponding to the above embodiments, and detailed description thereof will be omitted.

The release lever release holding mechanism 20A in this second embodiment is such that the projections 21a 'of the latch 21A' of the release lever latch 21A are cut out deeper than in the case of the above-described embodiment, and the protrusions are joined to each other. 22A) is narrow and has a long hook shape. The locking piece 23 provided on the latch 21A for the release lever is always in contact with the locking portion 14c of the latch 14 so as to rotate together with the latch 14. Moreover, the striker 18A provided in the front-end | tip part of the release lever 15 is made into the cross-sectional shape of the half moon shape which cut | disconnected the side toward the latch 21A for release levers. In addition, about other parts, it is the same as that of the 1st Example.

In the locking device 10A of the second embodiment configured as described above, the operation of each part at the time of its operation is the same as that described above. However, in the structure of this second embodiment, the locking piece 21a 'provided in the latch 21A for the release lever is deeply formed, and the locking piece provided in the latch 21A for the release lever in the locked state of the latch 14 is provided. Since the latch 23A always engages the latching portion 14c of the latch 14 so that the latch 21A for the release lever is also operated, a striker provided with the release lever 15 in the locked state. 18A and the release lever latch 21A are maintained in a non-contact state and have no advantage of being subjected to an external force on the window frame 6 side, so that they can withstand long-term use.

(Third embodiment)

Next, the locking device 10B of the third embodiment will be described. FIG. 8 is a partially cutaway view of the locking device according to the third embodiment, FIG. 9 is a sectional view seen from A-A of FIG. 8, and FIG. 10 is an explanatory view of the release lever holding mechanism.

The locking device 10B of this third embodiment is basically the same as the locking device 10 of the first embodiment, but the release lever release holding mechanism 20B is different. Therefore, the same reference numerals are given to the parts corresponding to the above embodiments, and the description thereof is omitted. In addition, the same code | symbol is attached | subjected to the latch which locks the closing of a window.

A latch notch 14a is formed in the latch 14 radially outward from the rotational center, and the latch notch 14a is sandwiched between the formation portion of the latch notch 14a and the support shaft 13, and is provided at two positions on the opposite circumference. The first locking recess 14b and the second locking recess 14d are formed. In addition, a torsion spring 17 is exposed to the support shaft 13 of the latch 14, and one end thereof is placed on the frame 12 side and the other end is placed in place of the latch 14, respectively. The rotational force is elastically supported in the clockwise direction.

With respect to the latch 14 thus constructed, the axis of the pivot support shaft pin 16 is positioned on an upstanding surface (a plane parallel to the window frame 6 in the drawing) passing through the axis of the support shaft 13. The release lever 15 is attached. The release lever 15 becomes the locking end portion 15a from the pivot support shaft pin 16, and the locking end portion 15a is attached to the first locking recess 14b provided with the latching portion 14a. When engaged, the latch 14 is locked. In addition, although illustration is abbreviate | omitted to this release lever 15, the torsion spring which can return after a latch release is attached (the same as that of 1st Embodiment).

Moreover, the striker 18 protrudes in parallel with the pivot support shaft pin 16 in the side surface close to the engaging end 15a of the said release lever 15, and is related with the release lever release holding mechanism 20B mentioned later. It is supposed to be.

The release lever release holding mechanism 20B is a locking claw piece 26 whose base is supported by a pivot support shaft 25 that is installed in parallel with the support shaft 13 at a lateral position of the latch 14 so that rotational movement is possible. And a spring (not shown) for elastically supporting the rotational kinetic force which always rotates the locking claw piece 26 to the support shaft 13 side of the latch 14 supports the recessed portion of the locking device 10B. It is installed between the frame (12). As a means for installing the spring (not shown), a torsion spring is fitted to the pivot support shaft 25, or a tension spring is tightly installed between the place of the locking claw piece 26 and the place of the frame 12. It is installed by the operation of.

The locking claw piece 26 has its tip end 26a pointed to release the length L from the pivot support shaft 25 axis center of the base to the tip end 26a as shown in FIG. 10. The striker 18 attached to the lever 15 does not protrude to the inside of the rotation radius r which rotates by the release operation, and the latching end 15a of the release lever 15 is formed by the latch 14. When engaged in the locking recessed portion 14b and in the locked state, the side surface of the end portion 26a of the locking claw piece 26 is in contact with the striker 18.

Moreover, the operation pin 27 protrudes in parallel with the pivot support shaft 25 in the said locking claw piece 26 in the intermediate position of the front end side by a suitable dimension in the pivot support shaft 25. As shown in FIG. This operation pin 27 normally contacts the circumferential surface between the first locking recess 14b and the second locking recess 14d of the latch 14 so that the locking claw piece 26 can be controlled. It is. In the figure, reference numeral 19 is a stopper for regulating the rotational movement range of the release lever 15.

Next, the operation of the locking device 10B of the third embodiment will be described with reference to FIGS. 11 and 12. First, in lifting and opening the front window 5, the handle 15 'of the release lever 15 is moved in the direction of the arrow (a) in Fig. 11 (a) so that the locking device 10B can be unlocked. When it is pulled out, the pivoting shaft pin 16 of the release lever 15 is rotated to a point, and as shown in Fig. 11 (b), the locking end portion 15a is moved from the locking recess portion 14b of the latch 14. Falls.

Subsequently, by further rotating the release lever 15, the striker 18 provided on the tip end side is in contact with the tip end side surface of the locking claw piece 26, and the locking claw piece 26 is applied to the spring force for the return. Push back against it. After that, when the intermediate part of the release lever 15 touches the stopper 19 and moves until the rotational movement is regulated, the locking claw which pushes back the side of the striker 18 immediately before the stopper 19 is regulated. The striker 18 extends to the side of the outer side of the locking claw piece 26 beyond the rotation radius (L: length from the axis center of the base pivot support shaft 25 to the tip) of the tip 26a of the piece 26. It will be in a contact state (refer FIG. 11 (c)). As a result, the release lever 15 is held by the locking claw piece 26 and the latch 14 can be freed.

In this way, since the latch 14 is released from the locked state (unlocking), as shown in Fig. 12 (a) by the return force of the torsion spring 17 (see Fig. 9) that is elastically supported, the arrow It is rotated in the direction of (b). At the same time, the operation pin 27 attached to the locking claw piece 26 is in contact with the outer peripheral surface of the adjacent portion of the latch 14.

The freed latch 14 has a window opening and closing handle 8, 8 ′ to open the front window 5, and as shown in FIG. 12b, by an operating force that pulls straight forward to lift the window frame 6. Reaction force is actively applied to the striker 30 engaged with the latch notch 14a of the latch and is actively rotated, and then separated from the striker 30 (see FIG. 12 (c)), and the window frame 6 is moved to the guide rail. (4) may be followed to lift (push) and store under the ceiling.

 When the latch 14 released in this way is rotated, and the first locking recess 14b is displaced by an appropriate amount in the engagement position with the locking end 15a of the release lever 15, the release lever is released earlier. Operation pin (27) attached to the locking claw piece (26) in contact with the latch circumferential surface which is not accompanied by the fixing at the release operation position of the release lever (15) by the locking claw piece (26) of the holding mechanism (20B). This is extruded by the protruding portion 14e of the circumferential surface of the latch 15 adjacent to the second locking recess 14d formed in advance. Then, this time, the tip 26a of the locking claw piece 26 against the striker 18 of the tip of the release lever 15 pushes the striker 18 back, and the striker 18 is returned to the latch 14 side. Return As a result, the engaging end 15a of the release lever 15 comes into contact with the main surface of the latch 14 as shown in Fig. 12B.

Therefore, when the engaging notch 14a of the latch 14 and striker 30 are released and the locking device 10B is completely released, the latch 14 of the torsion spring 17 that has been elastically supported is held. The rotational movement is stopped by engaging the engaging end portion 15a of the release lever 15 and the second engaging recess portion 14d which are rotated in the clockwise direction on the drawing with the return force and abutting against the latch circumferential surface. (See FIG. 12 (c)).

This is because the latch notch 14a of the latch 14 is held in a state capable of quickly engaging with the striker 30 the next time the window is closed in the state opened in the receiving direction of the striker 30. In addition, when locking the window frame 6 by operating the locking device 10B at the time of closing, since the latch 14 operates in the opposite way to the above-mentioned unlocking operation, the release lever 15 needs to be operated from any outside. There is no impact on the lock operation.

The locking device 10B configured as described above is provided with a release lever release holding mechanism different from the first and second embodiments, to facilitate the release operation of the latch 14 by the release lever 15.

(Example 4)

The present embodiment relates to a structure in which the closed window can be fixed and stored at the closed window position and the upper storage position (opening position) in the lift-opening cab window.

FIG. 13 is a vertical cross-sectional view showing a part of the locking device of the present embodiment without omission, FIG. 14 shows a main portion of the locking device, FIG. 15 is a view seen from BB of FIG. 13, and FIG. 16 is a view of FIG. 2 are enlarged cross-sectional views respectively seen from CC. Also in this embodiment, the same reference numerals are given to parts corresponding to the above embodiments, and detailed description thereof is omitted.

In the latch 14 of the present embodiment, as shown in FIG. 14 (shown on the right side as seen from the driver's seat), the latch notches 14a and 14b are radially displaced by 90 ° in the radial direction from the rotational center. It is formed at a location, and the bottoms of the locking notches 14a and 14b are semicircular, and the opening ends 14c and 14d and the opening ends 14e and 14f are formed in an arc shape on the opening side, which will be described later. The opening end part (striker confinement side end parts: 14d, 14f) of the receiving side of the striker 30 is formed slightly longer than the opening end part (striker holding side end parts: 14c, 14e) on the opposite side. In addition, the engaging recesses 14g and 14h are provided on the opposite circumferential edges with the forming portions of the engaging notches 14a and 14b interposed therebetween, respectively.

The latch 14 is positioned on the upright surface passing through the shaft center of the support shaft 13 freely rotatable so that the shaft center of the pivot support shaft pin 16 is positioned so that the release lever is opposite to the striker engaging portion in the closed window position. 15 is provided, and the rotational motion of the latch 14 is restricted by engaging the tip portion 15a of the release lever 15 with the locking recesses 14g and 14h of the latch 14. In addition, although not shown in the pivot support shaft pin 16 of this release lever 15, a torsion spring is fitted, one end thereof is connected to the stop member side, and the other end is connected to an appropriate position of the release lever 15 to release the latch. It's a good idea to be able to return later.

This latch 14 is supported so that it may be located just below the position where the guide rail 4 of the window frame 6 is arrange | positioned on the support shaft 13, and this latch 14 is shown in FIG. The torsion spring 17 is fitted to the support shaft 13, and one end is caught by the bracket 11 side, and the other end is connected in place, and the torsion spring 17 is given a rotational movement return force. The latch 14, the release lever 15, and the like, as described above, are supported and enclosed and protected by the frame 12 serving as the dividable cover. In the figure, reference numeral 19 is a stopper for stopping the rotation of the release lever 15.

Moreover, the striker 40 is provided in the cab main body 1 at the lower side of the guide rail 4 near the terminal end of the guide rail 4 inside the ceiling part of the cab main body 1 as shown in FIG. The mounting bracket 41 protrudes inward from the horizontal state in the width direction. This striker 40 is the other in the latch 14 of the locking mechanism 10C provided in the upper part of the said window frame 6 when the window frame 6 guided by the guide rail 4 moved to the storage position end. Of the notches 14b are arranged to be engaged.

The operation of opening and closing the front window 5 of the present embodiment constituted as described above will be described with reference to FIGS. 17 to 19. In addition, these figures are shown in the state seen from the side opposite to the window side cross section shown in FIG.

First, in order to close the window, each release lever 15 of the locking mechanisms 10C and 10C is operated by moving in the direction of arrow (a: arrow a in FIG. 13) in the state shown in FIG. The release lever 15 rotates from the support shaft pin 16 as a starting point, and its tip portion 15a falls from the locking recess 14g of the latch 13 (see Fig. 17 (b)). Moreover, the release lever 15 is restricted by the stopper 19 provided in the frame 12, and the range of rotational movement does not rotate more than necessary.

Then, the latch 14 is rotated by the return force of the torsion spring 17 provided on the support shaft 13, and acts as a counter force to the striker 30 to move forward. As a result, as shown in Fig. 18A, the locking notch 14a of the latch 14 is displaced in the rotational movement away from the engaged striker 30, and then the locking mechanism 10C when the engagement is released. ), The upper part of the window frame (6) installed can be retracted to release the fixing. At this point, the distal end portion 15a of the release lever 15 is engaged with another locking recess 14h of the latch 14, and is held in such a position as to prevent rotational movement.

When the fixing of the window frame 6 by the locking mechanism 10C is released in this way, the window frame 6 is supported by the guide roller 7 located at the lower part thereof being fitted to the lower end portion 4a of the guide rail 4 ( 13), the upper part can be rotated to the room side by the guide roller 7 of the lower part. In this way, as shown in FIG. 18 (b), the window frame 6 can retreat from the striker 30 in the closed window position P by leaving the locking notch 14a. Therefore, the operator grasps the lower window opening handle 8 'and the upper window opening handle 8 of the window frame 6 by hand, and simultaneously pulls the upper part of the window frame 6 forward and lifts it at the same time, and the upper guide roller 7 ) Can move from the branch part 4b of the guide rail 4 to the curved part 4c (refer FIG. 2), and can lift up as it is.

When the window frame 6 is raised in this way, the window frame 6 is guided by the guide rollers 7 and 7 of the up-down position to the guide rail 4, and can be moved to the ceiling from the front surface of the cab main body 1 at once. When the window frame 6 reaches its storage position, the latch 14 of the locking mechanism 10C is provided with the other locking notch 14b at the position immediately before the window frame 6 as shown in Fig. 19 (a). It is moved toward the opening so as to face the striker 40.

When the opening end 14f of the locking notch 14b of the latch 14 contacts the striker 40, the latch 14 is guided to the circular arc surface of the opening end 14f as shown in Fig. 19B. Is rotated in the direction of arrow b by the striker 40, and at the same time, the tip portion 15a of the release lever 15 is separated from the locking recess 14h of the latch 14. As shown in FIG. Subsequently, when the window frame 6 reaches the storing end position, as shown in Fig. 19 (c), the latch 14 receives the striker 40 into the latch notch 14b, and the tip end portion (of the release lever 15) ( 15a) is engaged in the locking recess 14g and locked at the corresponding position.

In this way, since the window frame 6 is locked by the locking mechanism 10C in a storage position, it is maintained safely and reliably in the cab main body 1, even if it receives a vibration from the outside, without slipping forward. .

In order to close the window 5 opened and lifted in this way, the window frame 6 can be lowered and the window opened can be closed by operating in the opposite direction to the said opening operation. That is, when lowering the window frame 6, the handle of the release lever 15 is pulled downward in the state shown in Fig. 19 (c) by the locking mechanisms 10C and 10C of the window frame 6 which are locked in the storage position. With the pivot support shaft pin 16 as the point, the engagement between the tip portion 15a and the locking recess 14g of the latch 14 is released, and the latch 14 is free.

Therefore, since the window frame 6 is free to move, when the window frame 6 is moved along the guide rail by holding the window opening / closing handles 8 and 8 ', the latch 14 of the locking mechanism 10C is freed. It is reversed by the restoring force of the torsion spring 17 which is elastically supported when it is dropped from the striker 40, and the latch portion 14 is retracted by engaging the tip portion 15a of the release lever 15 again with the locking recess 14h. The window frame 6 can be returned to its original position in the posture shown in 19 (a).

When the window frame 6 is returned to the front of the cab main body 1 in this way, the guide roller 7 located in the lower part of the window frame 6 of the front window 5 is aligned with the lower end portion 4a of the guide rail 4. When the posture is lowered and the upper part of the window frame 6 is pushed forward, the upper guide roller 7 can move into the branch portion 4b of the guide rail and move to the closed window position. Immediately before moving to the closed window position, the locking mechanism 10C is in a standing state together with the window frame 6, and as shown in Fig. 18 (c), the latch notch 14a of the latch 14 moves the striker ( The posture of opening toward 30 is maintained.

Therefore, when holding the window opening / closing handle 8 and pushing the window frame 6 forward, as shown in Fig. 18A, the locking notch 14a for opening the latch 14 to the striker 30 is shown. The opening end portion 14d of the s) contacts and inverts the latch 14 with the forward movement of the window frame 6, and then receives the striker 30 in the locking notch 14a to reach the closed window position. At the same time, as shown in FIG. 17A, the striker 30 is completely received in the latch notch 14a of the latch 14. In the meantime, the release lever 15 has a torsional spring (14a) whose front end portion (15a) is separated from the position of the locking recess (14h), is engaged with the other locking recess (14g), and is simultaneously attached to the latch (14). 17) The locking force by the distal end portion 15a of the release lever 15 engaged with the locking notch 14g due to the accumulated force of the torsion spring 17 is rotated against this return force and is conversely condensed. It is held and the rotational movement of the latch 14 is engaged. In other words, the latch 14 is locked and the front window 5 is fixed to the window portion.

In this way, in opening and closing the front window 5, the locking mechanism 10C attached to the window frame 6 is opened with the locking notch 14a engaged with the striker 30 at the closed window position by the latch 14 that rotates. The locking notch 14b, which is engaged with the striker 40, is disposed at a predetermined rotational angle in a storage position of the city, and is automatically engaged as the posture of the window frame 6 moves from the standing state to the collapsed state. By changing the position and engaging position of the locking recess 14g or the locking recess 14h on the side of the latch 14 with the tip portion 15a of the release lever 15 at the same time, the striker ( 30 or the striker 40 and the locking notch 14a or the locking notch 14b can be engaged with each other without operating from the outside at that time, so that the operator can be engaged with the latch 14 by the release lever 15. Strei 30 or walking with the striker 40 by the movement of the window frame 6 with only the operation to turn off the alignment and it is performed the opening and closing of the apchang 5, it is possible to reliably fix the window frame in pyechang position or the retracted position.

In addition, in the process of engaging the latch notch 14a or the latch notch 14b of the latch 14 with the striker 30 or the striker 40, respectively, the initial contact of the latch notch 14a, 14b also occurs. Since the opening end portion 14d or the opening end portion 14f first contacted at the step is slightly longer than the opening end portion 14c or the opening end portion 14e on the opposite side, it is easy to receive the striker 30 or the striker 40. In other words, it will be able to function securely.

Moreover, in the closed window position, since the striker 30 is related so that it may be located above the latch 14, the window frame upper part can be pushed forward and locked without difficulty, and the striker 30 presses the latch 14 downwards. As a result, vibration of the window frame can be suppressed. Since the striker 40 is located at the lower side of the latch 14 at the storing position, the locking portion is locked in a posture to hold the window frame 6 at the storing position, so that the locker is released from the locking portion even when subjected to vibration or the like. It can be kept safe.

In the above description, the front window installed in the cab of the construction machine has been described, but according to the purpose of the present invention, it can be employed as an impression-opening window such as a house. Since it is an easy structure, there is no discomfort in lifting and storing a window frame, and it is convenient.

Claims (4)

A cab window locking device, which is guided to a pair of left and right guide rails attached to a support structure and moved in a direction where the posture moves in a direction intersecting the standing position by moving the movable window frame upward from the standing position, At both ends of the upper side of the window frame, a latch capable of a rotational movement having a position outside the width of the window frame in the width direction and inward of the guide rail at a position where two locking notches are displaced at a required angle is regulated. In addition, a locking mechanism having a release lever for releasing is provided, and a striker which engages with the latch notch of the latch and holds the window frame at the upper end of the standing position of the window frame and the end portion of the storing position on the axis of rotation of the latch. Cab window locks, characterized in that arranged in parallel to each support structure. 2. The latch according to claim 1, wherein the latch is secured to the support structure during closing and is engaged with the first striker protruding from the upper side of the rotation support shaft to lock the latch. A cab window locking device, characterized in that it has a latching notch that can engage and support the second striker that is fixedly supported and protrudes from the lower side of the rotation support shaft. The cab window locking device according to claim 1, wherein the latch notch of the latch is opened in a radial direction. 2. The cab window locking device according to claim 1, wherein the striker confinement side end portion of the opening in the latch notch of the latch is formed longer than the striker holding side end portion.

Images